Mitsubishi MELSEC-F FX3U Series User Manual

(2)
Safety Precautions
(Read these precautions before using.)
2. WIRING PRECAUTIONS
3. STARTUP AND MAINTENANCE PRECAUTIONS
• Make sure to cut off all phases of the power supply externally before starting the wiring work.
Failure to do so may cause electric shock and damages to the product.
• Connect the DC power supply wiring to the dedicated terminals described in this manual.
If an AC power supply is connected to a DC input/output terminal or DC power supply terminal, the PLC will be
burnt out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• Perform class D grounding (grounding resistance: 100Ω or less) to the grounding terminal in the main unit.
Do not connect the grounding terminal at the same point as a heavy electrical system.
• During the wiring work, do not let cutting chips and wire chips enter ventilation slits.
• Make sure to observe the precautions below in order to prevent any damage to a machine or any accident which
might be caused by abnormal data written in the PLC due to the influence of noise:
- Do not lay close or bundle with the main circuit, high-voltage power line, or load line.
Otherwise effects of noise or surge induction are likely to take place.
Keep a safe distance of more than 100 mm (3.94") from the above when wiring.
- Ground the shield wire or shield of a shielded cable at one point on the PLC. However, do not ground at the
same point as high voltage lines.
• Observe the following items to wire the lines to the European terminal board. Ignorance of the following items may
cause electric shock, short circuit, disconnection, or damage of the product.
- The disposal size of the cable end should be 9 mm (0.35").
- Tightening torque should be between 0.22 to 0.25 N
•
m.
- Twist the end of strand wire and make sure there is no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect electric wires of unspecified size or beyond the specified number of electric wires.
- Fix the electric wires so that the terminal block and connected parts of electric wires are not directly stressed.
• Do not touch any terminal while the PLC's power is on.
Doing so may cause electrical shock or malfunctions.
• Before cleaning or retightening terminals, externally cut off all phases of the power supply.
Failure to do so may expose you to shock hazard.
• Before modifying the program under operation or performing operation for forcible output, running or stopping,
carefully read the manual, and sufficiently ensure the safety.
An operation error may damage the machine or cause accidents.
• Do not change programs in the PLC from two or more peripheral equipment (such as the programming tool and
GOT) at the same time.
Such changes may cause destruction or malfunction of programs in the PLC.
• Do not disassemble or modify the PLC.
Doing so may cause failures, malfunctions or fire.
For repair, contact your local Mitsubishi Electric distributor.
• Before connecting or disconnecting any extension cable, turn off power.
Failure to do so may cause unit failure or malfunctions.
• Make sure to turn off the power before attaching or removing the peripheral equipment, function extension board,
special adaptor, or extension block.
Failure to do so may cause device failure or malfunctions.

Mitsubishi MELSEC-F FX3U Series Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U Series
Category	Controller
Language	English